mono/tests/marshal2.cs

   1 //
   2 // Tests for Marshal.StructureToPtr and PtrToStructure
   3 //
   4
   5 using System;
   6 using System.Text;
   7 using System.Runtime.InteropServices;
   8
   9 public class Tests {
  10
  11
  12         [StructLayout (LayoutKind.Sequential)]
  13         public class SimpleObj {
  14                 public int a;
  15                 public int b;
  16
  17                 public void test () {}
  18         }
  19
  20         [StructLayout (LayoutKind.Sequential)]
  21         public struct SimpleStruct2 {
  22                 public int a;
  23                 public int b;
  24         }
  25
  26         [StructLayout (LayoutKind.Sequential, CharSet=CharSet.Ansi)]
  27         public struct SimpleStruct {
  28                 public int a;
  29                 public bool bool1;
  30                 public bool bool2;
  31                 public int b;
  32                 [MarshalAs (UnmanagedType.ByValArray, SizeConst=2)] public short[] a1;
  33                 [MarshalAs (UnmanagedType.ByValTStr, SizeConst=4)] public string s1;
  34                 public SimpleStruct2 emb1;
  35                 public SimpleObj emb2;
  36                 public string s2;
  37                 public double x;
  38                 [MarshalAs (UnmanagedType.ByValArray, SizeConst=2)] public char[] a2;
  39         }
  40
  41         [StructLayout (LayoutKind.Sequential, CharSet=CharSet.Ansi)]
  42         public struct ByValTStrStruct {
  43                 [MarshalAs (UnmanagedType.ByValTStr, SizeConst=4)] public string s1;
  44                 public int i;
  45         }
  46
  47         [StructLayout (LayoutKind.Sequential, CharSet=CharSet.Unicode)]
  48         public struct ByValWStrStruct {
  49                 [MarshalAs (UnmanagedType.ByValTStr, SizeConst=4)] public string s1;
  50                 public int i;
  51         }
  52
  53         [StructLayout (LayoutKind.Sequential, Pack=1)]
  54         public struct PackStruct1 {
  55                 float f;
  56         }
  57
  58         [StructLayout (LayoutKind.Sequential)]
  59         public struct PackStruct2 {
  60                 byte b;
  61                 PackStruct1 s;
  62         }
  63
  64         public unsafe static int Main (String[] args) {
  65                 if (TestDriver.RunTests (typeof (Tests), args) != 0)
  66                         return 34;
  67                 return 0;
  68         }
  69
  70         public static int test_0_structure_to_ptr () {
  71                 SimpleStruct ss = new SimpleStruct ();
  72                 int size = Marshal.SizeOf (typeof (SimpleStruct));
  73
  74                 //if (size != 52)
  75                 //return 1;
  76
  77                 IntPtr p = Marshal.AllocHGlobal (size);
  78                 ss.a = 1;
  79                 ss.bool1 = true;
  80                 ss.bool2 = false;
  81                 ss.b = 2;
  82                 ss.a1 = new short [2];
  83                 ss.a1 [0] = 6;
  84                 ss.a1 [1] = 5;
  85                 ss.s1 = "abcd";
  86                 ss.emb1 = new SimpleStruct2 ();
  87                 ss.emb1.a = 3;
  88                 ss.emb1.b = 4;
  89                 ss.emb2 = new SimpleObj ();
  90                 ss.emb2.a = 10;
  91                 ss.emb2.b = 11;
  92                 ss.s2 = "just a test";
  93                 ss.x = 1.5;
  94                 ss.a2 = new char [2];
  95                 ss.a2 [0] = 'a';
  96                 ss.a2 [1] = 'b';
  97
  98                 Marshal.StructureToPtr (ss, p, false);
  99                 Type t = ss.GetType ();
 100
 101                 if (Marshal.ReadInt32 (p, (int)Marshal.OffsetOf (t, "a")) != 1)
 102                         return 1;
 103                 if (Marshal.ReadInt32 (p, (int)Marshal.OffsetOf (t, "bool1")) != 1)
 104                         return 2;
 105                 if (Marshal.ReadInt32 (p, (int)Marshal.OffsetOf (t, "bool2")) != 0)
 106                         return 3;
 107                 if (Marshal.ReadInt32 (p, (int)Marshal.OffsetOf (t, "b")) != 2)
 108                         return 4;
 109                 if (Marshal.ReadInt16 (p, 16) != 6)
 110                         return 5;
 111                 if (Marshal.ReadInt16 (p, 18) != 5)
 112                         return 6;
 113                 if (Marshal.ReadByte (p, 20) != 97)
 114                         return 7;
 115                 if (Marshal.ReadByte (p, 21) != 98)
 116                         return 8;
 117                 if (Marshal.ReadByte (p, 22) != 99)
 118                         return 9;
 119                 if (Marshal.ReadByte (p, 23) != 0)
 120                         return 10;
 121                 if (Marshal.ReadInt32 (p, 24) != 3)
 122                         return 11;
 123                 if (Marshal.ReadInt32 (p, 28) != 4)
 124                         return 12;
 125                 if (Marshal.ReadInt32 (p, 32) != 10)
 126                         return 13;
 127                 if (Marshal.ReadInt32 (p, 36) != 11)
 128                         return 14;
 129                 if (Marshal.ReadByte (p, (int)Marshal.OffsetOf (t, "a2")) != 97)
 130                         return 15;
 131                 if (Marshal.ReadByte (p, (int)Marshal.OffsetOf (t, "a2") + 1) != 98)
 132                         return 16;
 133
 134                 SimpleStruct cp = (SimpleStruct)Marshal.PtrToStructure (p, ss.GetType ());
 135
 136                 if (cp.a != 1)
 137                         return 16;
 138
 139                 if (cp.bool1 != true)
 140                         return 17;
 141
 142                 if (cp.bool2 != false)
 143                         return 18;
 144
 145                 if (cp.b != 2)
 146                         return 19;
 147
 148                 if (cp.a1 [0] != 6)
 149                         return 20;
 150
 151                 if (cp.a1 [1] != 5)
 152                         return 21;
 153
 154                 if (cp.s1 != "abc")
 155                         return 22;
 156
 157                 if (cp.emb1.a != 3)
 158                         return 23;
 159
 160                 if (cp.emb1.b != 4)
 161                         return 24;
 162
 163                 if (cp.emb2.a != 10)
 164                         return 25;
 165
 166                 if (cp.emb2.b != 11)
 167                         return 26;
 168
 169                 if (cp.s2 != "just a test")
 170                         return 27;
 171
 172                 if (cp.x != 1.5)
 173                         return 28;
 174
 175                 if (cp.a2 [0] != 'a')
 176                         return 29;
 177
 178                 if (cp.a2 [1] != 'b')
 179                         return 30;
 180                 return 0;
 181         }
 182
 183         [StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
 184         public struct Struct1
 185         {
 186                 [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]
 187         public string Field1;
 188                 [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 10)]
 189         public string Field2;
 190                 [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 14)]
 191         public string Field3;
 192         }
 193
 194         public static int test_0_byvaltstr () {
 195                 ByValTStrStruct s = new ByValTStrStruct ();
 196
 197                 IntPtr p2 = Marshal.AllocHGlobal (Marshal.SizeOf (typeof (ByValTStrStruct)));
 198                 Marshal.StructureToPtr(s, p2, false);
 199
 200                 /* Check that the ByValTStr is initialized correctly */
 201                 for (int i = 0; i < 4; ++i)
 202                         if (Marshal.ReadByte (p2, i) != 0)
 203                                 return 31;
 204
 205                 s.s1 = "ABCD";
 206                 s.i = 55;
 207
 208                 Marshal.StructureToPtr(s, p2, false);
 209
 210                 ByValTStrStruct s2 = (ByValTStrStruct)Marshal.PtrToStructure (p2, typeof (ByValTStrStruct));
 211
 212                 /* The fourth char is lost because of null-termination */
 213                 if (s2.s1 != "ABC")
 214                         return 32;
 215
 216                 if (s2.i != 55)
 217                         return 33;
 218
 219                 // Check that decoding also respects the size, even when there is no null terminator
 220                 byte[] data = Encoding.ASCII.GetBytes ("ABCDXXXX");
 221                 int size = Marshal.SizeOf (typeof (ByValTStrStruct));
 222                 IntPtr buffer = Marshal.AllocHGlobal (size);
 223                 Marshal.Copy (data, 0, buffer, size);
 224
 225                 s2 = (ByValTStrStruct)Marshal.PtrToStructure (buffer, typeof (ByValTStrStruct));
 226                 if (s2.s1 != "ABC")
 227                         return 34;
 228
 229                 return 0;
 230         }
 231
 232         public static int test_0_byvaltstr_unicode () {
 233                 ByValWStrStruct s = new ByValWStrStruct ();
 234
 235                 IntPtr p2 = Marshal.AllocHGlobal (Marshal.SizeOf (typeof (ByValWStrStruct)));
 236                 Marshal.StructureToPtr(s, p2, false);
 237
 238                 /* Check that the ByValWStr is initialized correctly */
 239                 for (int i = 0; i < 8; ++i)
 240                         if (Marshal.ReadByte (p2, i) != 0)
 241                                 return 31;
 242
 243                 s.s1 = "ABCD";
 244                 s.i = 55;
 245
 246                 Marshal.StructureToPtr(s, p2, false);
 247
 248                 ByValWStrStruct s2 = (ByValWStrStruct)Marshal.PtrToStructure (p2, typeof (ByValWStrStruct));
 249
 250                 /* The fourth char is lost because of null-termination */
 251                 if (s2.s1 != "ABC")
 252                         return 32;
 253
 254                 if (s2.i != 55)
 255                         return 33;
 256                 return 0;
 257         }
 258
 259         public static int test_0_byvaltstr_max_size () {
 260                 string buffer = "12345678123456789012345678901234";
 261
 262                 IntPtr ptr = Marshal.StringToBSTR (buffer);
 263
 264                 Struct1 data = (Struct1)Marshal.PtrToStructure (ptr, typeof (Struct1));
 265                 if (data.Field1 != "12345678")
 266                         return 1;
 267                 if (data.Field2 != "1234567890")
 268                         return 2;
 269                 if (data.Field3 != "12345678901234")
 270                         return 3;
 271                 return 0;
 272         }
 273
 274         // Check that the 'Pack' directive on a struct changes the min alignment of the struct as well (#12110)
 275         public static int test_0_struct_pack () {
 276                 if (Marshal.OffsetOf (typeof (PackStruct2), "s") != new IntPtr (1))
 277                         return 1;
 278                 return 0;
 279         }
 280 }